MIV V5 Heat Recovery DC Inverter R410A
DM14-01.01.18en
Troubleshooting
190
Attached table 3: Commissioning and operating parameters of refrigerant system
Conditions 1:
Make sure outdoor unit can detect all the indoor units, the quantity of indoor units display steadily and be equal to
actual quantity of installed indoor units.
Conditions 2:
Make sure all the valves in outdoor unit are open, indoor units EXV have connected to indoor PCB.
Conditions 3:
The ratio of connectable indoor units is 100%. When ambient temperature is high, operate the system in cooling
mode and set the temperature 17
o
C. When ambient temperature is low, operate the system in heating mode and set the
temperature 30
o
C. Then get the parameters after system running normally more than 30 minutes.
Outdoor unit cooling parameters table
Ambient temperature (T4)
o
C 20-27 27-33 33-38 38-45
Discharge pressure (spot check)
MPa
2.1-2.3 2.8-3.1 3.3-3.5 3.7-3.9
Pressure of high pressure valve
MPa 1.8-2.0 2.4-2.7 2.8-3.0 3.2-3.5
Pressure of low pressure valve
MPa 0.7-0.9 0.8-1.0 1.0-1.2 1.2-1.4
Discharge temperature (spot check)
o
C 50-65 70-85 70-90 80-90
DC inverter compressor current (spot check)
A
4-5
6-7
7~8
9-11
Average temperature of evaporator outlet T2B
o
C 8-9 12-15 16-17 20
Outdoor unit heating parameters table
Ambient temperature (T4)
o
C -15--5 -5-5 5-12 12-18
Discharge pressure (spot check)
MPa 2.0-2.2 2.2-2.7 3.0-3.1 2.6-2.7
Pressure of high pressure valve
MPa 1.7-1.8 1.8-2.4 2.6-2.8 2.1-2.4
Pressure of low pressure valve
MPa 2.0-2.2 2.2-2.6 3.0-3.1 2.5-2.7
Discharge temperature (spot check)
o
C 50-70 60-70 60-85 60-70
DC inverter compressor current (spot check)
A
5
5-6
6-8
5-6
Average temperature of condenser outlet T2
o
C 33 33-40 46-50 39-41
